CN114806026B - Cold-shrinkable ethylene propylene rubber pipe material and preparation method thereof - Google Patents
Cold-shrinkable ethylene propylene rubber pipe material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention provides a preparation method of cold-shrinkable ethylene propylene rubber pipe material. And (3) spray-drying the mixed solution of the white carbon black, the calcium carbonate, the magnesium hydroxide and the coupling agent by using a spray dryer to obtain high-dispersion white filler particles, then placing the high-dispersion white filler particles and the isolating agent into a planetary ball mill to be ground into 500-800-mesh high-dispersion white filler powder, and finally uniformly mixing the high-dispersion white filler powder, the ethylene propylene rubber, the silicon rubber, the ethylene-acrylic ester copolymer, the stearic acid, the zinc oxide, the vulcanization accelerator, the vulcanizing agent and the anti-aging agent in an internal rubber mixer, vulcanizing and molding the rubber compound, and testing physical and mechanical properties, ageing resistance and flame retardance. The test result shows that the product of the invention can obviously improve the tensile strength and the elongation at break of vulcanized rubber products, and exceeds the physical and mechanical performance indexes of traditional silicone rubber products. Meanwhile, the ageing resistance and the flame retardance of the product are improved to a certain extent. The product of the invention can be used as a cold-shrinkable tube material in the communication field, and can improve the mechanical property, the service life and the flame retardant property of the cold-shrinkable tube product.
Description
Technical Field
The invention relates to a preparation method of a cold-shrinkable ethylene propylene rubber pipe material, belongs to the technical field of polymer material formula modification, and particularly relates to a preparation method of a cold-shrinkable ethylene propylene rubber pipe material and application of the cold-shrinkable ethylene propylene rubber pipe material in communication cold-shrinkable pipe materials.
Background
The main raw materials of the cold shrinkable tube adopt silicon rubber and ethylene propylene rubber, the technical principle is that raw rubber is fully mixed with auxiliary agent and filler to be vulcanized and formed, and the original linear structure is changed into a three-dimensional network body-shaped structure, so that the intermolecular acting force and macroscopic elasticity of the rubber and the filler are enhanced. And then the cross-linked pipe is plugged into the support pipe through mechanical expansion of the inner diameter, and the support pipe is pulled out when in use, so that the purpose of protecting the communication component can be achieved through cold shrinkage. The cold shrinkable tube is a main product for external protection in the communication 4G and 5G fields, and has wide application in the communication field nowadays. Meanwhile, the cold-shrinkable tube has high requirements on rubber materials, the rubber materials are required to have high tensile strength and elongation at break, and the rubber materials also have long service life and certain flame retardant property, and the conventional preparation technology of the rubber materials cannot meet the use requirements of the cold-shrinkable tube materials.
According to the invention, the filler, the auxiliary agent and the coupling agent are subjected to spray drying technology to generate high-dispersion particles, the spray-dried particles are ball-milled into fine powder, and finally the fine powder is added during rubber mixing, so that the physical and mechanical properties, ageing resistance and flame retardance of the vulcanized and formed crosslinked product are improved to different degrees, the difficult problem in the prior art is solved, and the method is not found in patent reports.
Disclosure of Invention
In order to solve the problems existing in the prior art, the invention provides a preparation method of cold-shrinkable ethylene propylene rubber pipe materials.
The invention provides a preparation method of cold-shrinkable ethylene propylene rubber pipe material, which comprises the following steps and conditions:
the invention uses a spray dryer to mix and dry white carbon black, calcium carbonate, magnesium hydroxide and a coupling agent to prepare high-dispersion white filler particles, then puts the high-dispersion white filler particles and a release agent into a planetary ball mill to grind to 500-800 meshes to form high-dispersion white filler powder, and finally sequentially adds ethylene propylene rubber, an auxiliary agent and a filler into a closed rubber mixer to prepare the cold-shrinkage ethylene propylene rubber pipe material. Compared with the traditional product, the material provided by the invention can obviously improve the physical and mechanical properties, ageing resistance and flame retardance of the crosslinked product.
The spray dryer used in the invention is not limited to model and condition parameters, and can prepare various filler additives into particles;
the planetary ball mill used in the invention is not limited to model and condition parameters, and only needs to grind the high-dispersion white particles into superfine powder of 500-800 meshes;
the internal mixer used in the invention is not limited by model and condition parameters, and can uniformly mix rubber, filler and auxiliary agent;
the coupling agent used in the invention is one or more of vinyl tri (beta-methoxyethoxy) silane (A172), vinyl trichlorosilane (A150), gamma-aminopropyl triethoxysilane (A-1100), vinyl triethoxysilane (A151), methyl mercaptopropyl dimethoxysilane, bis [ (3-triethoxysilyl) propyl ] tetrasulfide (Si-69), preferably vinyl triethoxysilane (A151) and bis [ (3-triethoxysilyl) propyl ] tetrasulfide (Si-69).
The isolating agent used in the invention comprises one or more of calcium oxide, calcium carbonate, sodium dodecyl benzene sulfonate, polyoxyethylene sorbate and tween-60, preferably calcium oxide, sodium dodecyl benzene sulfonate and polyoxyethylene sorbate;
the vulcanization accelerator used in the invention is one or more of triallyl isocyanurate (TAIC), N' -m-phenylene bismaleimide (HVA 2) and trimethylolpropane trimethacrylate (TMPTMA), and the accelerators TAIC and HVA2 are preferred;
the vulcanizing agent adopted by the invention is one or more of dicumyl peroxide (DCP), 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane (bis 2-5) or di-tert-butyl peroxide (DTBP), and DCP and bis 2-5 are preferred;
the anti-aging agent adopted by the invention comprises one or more of N-phenyl-beta-naphthylamine (anti-aging agent D), 2, 4-trimethyl-1, 2-dihydroquinoline polymer (anti-aging agent RD), 2-thiol benzimidazole (anti-aging agent MB), N-di-N-butyl nickel dithiocarbamate (anti-aging agent NBC), N-isopropyl-N' -phenyl-p-phenylenediamine (anti-aging agent 4010 NA) and the like, and the anti-aging agent RD and the anti-aging agent 4010NA are preferable;
the white carbon black, calcium carbonate, magnesium hydroxide, stearic acid and zinc oxide adopted by the invention are all commercial products, and specific manufacturers and parameters are shown in table 1.
TABLE 1 auxiliary agent information Table
The rubber used in the invention comprises one or more of ethylene propylene rubber, silicon rubber and ethylene-acrylic ester copolymer, and specific index parameters are shown in table 2.
TABLE 2 rubber raw material information Table
(a) In a spray dryer, white carbon black, calcium carbonate and magnesium hydroxide are mixed with a coupling agent according to the mass ratio of 100:10 to 50:10 to 50:1 to 5 are added in sequence. The spray dryer temperature is 150-250 ℃, the spray speed is 20-80 ml/min, and the highly dispersed white filler particles are obtained.
(b) According to the highly dispersed white filler particles: the mass ratio of the release agent is 100: 1-5, putting high-dispersion white filler particles and a release agent into a planetary ball mill, mixing at an initial temperature of 25-35 ℃, and after mixing at a temperature of 35-100 ℃, and revolving for 100-200 revolutions per minute, wherein the rotation is carried out: 200-400 rpm, mixing for 10-30 min, and screening with 5-20 layers of screens to obtain 500-800 mesh high-dispersion white filler powder;
(c) In an internal mixer, ethylene propylene rubber, silicone rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, vulcanization accelerator, vulcanizing agent, high-dispersion white filler powder and anti-aging agent are sequentially added into the internal mixer, and the mass ratio of each component is 50-100: 5-50: 10 to 50:0.5 to 5:0 to 5:0.5 to 2:0.5 to 3: 20-80: 1 to 3 are added in sequence. The temperature of the internal mixer is 50-100 ℃, the rotating speed is 20-120 r/min, after mixing for 5-10 minutes, the upper top bolt is opened, and the rubber is discharged. Vulcanizing the mixed rubber on a vulcanizing machine at the temperature of 150-180 ℃ and the pressure of 5-15 MPa for 20-40 min, discharging the sheet after the vulcanizing reaction is completed, and testing the physical and mechanical properties, the ageing resistance and the flame retardance.
The beneficial effects are that:
compared with the prior art, the invention has the following beneficial effects:
(a) The tensile strength and the elongation at break of the vulcanized rubber can be obviously improved, wherein the tensile strength is improved by 69.0 to 97.3 percent, and the elongation at break is improved by 28.9 to 47.5 percent, and the details are shown in Table 3.
(b) The cold-shrinkable ethylene propylene rubber pipe material can improve the ageing resistance and the flame retardance of the product, wherein the ageing resistance is improved by 4.6-14.0%, and the flame retardance is improved by 10.3-21.4%, as shown in Table 3.
Detailed Description
Example 1:
the preparation method of the cold-shrinkable ethylene propylene rubber pipe material comprises the following steps and conditions:
(a) In a spray dryer, white carbon black, calcium carbonate and magnesium hydroxide are mixed with a coupling agent A151 according to a mass ratio of 100:10:10:1 are added in sequence. The spray dryer temperature is 150 ℃ and the spray speed is 20ml/min, so as to obtain the high-dispersion white filler particles.
(b) According to the highly dispersed white filler particles: the mass ratio of the isolating agent calcium oxide is 100:1, putting high-dispersion white filler particles and a release agent calcium oxide into a planetary ball mill, wherein the initial temperature of mixing is 25 ℃, the temperature of mixing is 35 ℃, and revolution is 100 revolutions per minute, and autorotation is carried out: 200 rpm, mixing for 10 minutes, and screening by a 5-layer screen to obtain 500-mesh high-dispersion white filler powder;
(c) In an internal mixer, ethylene propylene rubber, silicone rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, a vulcanization accelerator TAIC, a vulcanizing agent DCP, high-dispersion white filler powder and an anti-aging agent RD are sequentially added into the internal mixer, wherein the mass ratio of each component is 50:20:30:0.5:3:1:1.5:20:1. the temperature of the internal mixer is 50 ℃, the rotating speed is 20 revolutions per minute, after mixing for 10 minutes, the upper top bolt is opened, and the rubber is discharged. Vulcanizing the rubber compound on a vulcanizing machine at the temperature of 150 ℃ and the pressure of 5MPa for 40min, discharging the sheet after the vulcanizing reaction is completed, and testing the physical and mechanical properties, ageing resistance and flame retardance of the sheet, wherein the details are shown in Table 3.
Example 2:
the preparation method of the cold-shrinkable ethylene propylene rubber pipe material comprises the following steps and conditions:
(a) In a spray dryer, white carbon black, calcium carbonate and magnesium hydroxide are mixed with a coupling agent Si-69 according to the mass ratio of 100:50:50:5 are added in sequence. The temperature of the spray dryer is 250 ℃, and the spray speed is 80ml/min, so as to obtain high-dispersion white filler particles;
(b) According to the highly dispersed white filler particles: the mass ratio of the sodium dodecyl benzene sulfonate serving as a release agent is 100:5, putting high-dispersion white filler particles and a release agent sodium dodecyl benzene sulfonate into a planetary ball mill, mixing at an initial temperature of 35 ℃, and after mixing at a temperature of 80 ℃, and revolving for 200 revolutions per minute, wherein the rotation is that: 400 rpm, mixing for 30 minutes, and screening by a 20-layer screen to obtain 800-mesh high-dispersion white filler powder;
(c) In an internal mixer, ethylene propylene rubber, silicone rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, a vulcanization accelerator HVA2, vulcanizing agent double 2-5, high-dispersion white filler powder and an anti-aging agent 4010NA are sequentially added into the internal mixer, wherein the mass ratio of the components is 85:5:10:2:5:2:3:80:3. the temperature of the internal mixer is 100 ℃, the rotating speed is 120 r/min, after mixing for 5 minutes, the upper top bolt is opened, and the rubber is discharged. Vulcanizing the rubber compound on a vulcanizing machine at 180 ℃ under 15MPa for 20min, discharging the sheet after the vulcanizing reaction is completed, and testing the physical and mechanical properties, ageing resistance and flame retardance of the rubber compound, wherein the details are shown in Table 3.
Example 3:
the preparation method of the cold-shrinkable ethylene propylene rubber pipe material comprises the following steps and conditions:
(a) In a spray dryer, white carbon black, calcium carbonate and magnesium hydroxide are mixed with a coupling agent Si-69 according to the mass ratio of 100:20:30:2 are added sequentially. The spray dryer temperature is 180 ℃ and the spray speed is 60ml/min, so that the high-dispersion white filler particles are obtained.
(b) According to the highly dispersed white filler particles: the mass ratio of the isolating agent polyoxyethylene sorbate is 100:2, putting high-dispersion white filler particles and a release agent of sorbic acid polyoxyethylene into a planetary ball mill, mixing at an initial temperature of 30 ℃, mixing at a temperature of 60 ℃, and revolving for 150 revolutions per minute, and rotating: 300 rpm, mixing for 20 minutes, and screening by a 10-layer screen to obtain 600-mesh high-dispersion white filler powder;
(c) In an internal mixer, ethylene propylene rubber, silicone rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, a vulcanization accelerator TAIC, a vulcanizing agent DCP, high-dispersion white filler powder and an anti-aging agent RD are sequentially added into the internal mixer, wherein the mass ratio of each component is 70:10:20:1:3:1.5:3:60:2 are added sequentially. The temperature of the internal mixer is 80 ℃, the rotating speed is 80 revolutions per minute, after mixing for 8 minutes, the upper top bolt is opened, and the rubber is discharged. The rubber compound is vulcanized on a vulcanizing machine at 160 ℃ under 10MPa for 30min, and after the vulcanization reaction is completed, the rubber compound is subjected to sheet forming, and the physical and mechanical properties, ageing resistance and flame retardance of the rubber compound are tested, and are shown in Table 3.
Example 4:
(c) Step (3) the physical and mechanical properties, aging resistance and flame retardance were measured in the same manner as in example 3 using TMPTMA for vulcanization accelerator and bis-25 for vulcanizing agent, and the details are shown in Table 3.
Example 5:
(b) The step of using Tween-60 as a separator, (c) using HVA2 as a vulcanization accelerator and DCP as a vulcanizing agent, and the other steps were the same as those of example 3, and physical and mechanical properties, aging resistance and flame retardance were measured and shown in Table 3.
Comparative example 1:
the preparation method of the cold-shrinkable ethylene propylene rubber pipe material comprises the following steps and conditions:
in an internal mixer, ethylene propylene rubber, silicone rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, a vulcanization accelerator TAIC, a vulcanizing agent DCP, white carbon black, calcium carbonate, magnesium hydroxide, a coupling agent Si-69 and an anti-aging agent RD are sequentially added into the internal mixer, wherein the mass ratio of each component is 70:10:20:1:3:1.5:3:39.5:7.9:11.8:0.8:2. the temperature of the internal mixer is 80 ℃, the rotating speed is 80 revolutions per minute, after mixing for 8 minutes, the upper top bolt is opened, and the rubber is discharged. The rubber compound is vulcanized on a vulcanizing machine at 160 ℃ under 10MPa for 30min, and after the vulcanization reaction is completed, the rubber compound is subjected to sheet forming, and the physical and mechanical properties, ageing resistance and flame retardance of the rubber compound are tested, and are shown in Table 3.
Comparative example 2:
the preparation method of the cold-shrinkable ethylene propylene rubber pipe material comprises the following steps and conditions:
(a) In a spray dryer, white carbon black, calcium carbonate and magnesium hydroxide are mixed with a coupling agent Si-69 according to the mass ratio of 100:20:30:2 are added sequentially. The spray dryer temperature is 180 ℃ and the spray speed is 60ml/min, so that the high-dispersion white filler particles are obtained.
(b) In an internal mixer, ethylene propylene rubber, silicone rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, a vulcanization accelerator TAIC, a vulcanizing agent DCP, high-dispersion white filler powder and an anti-aging agent RD are sequentially added into the internal mixer, wherein the mass ratio of each component is 70:10:20:1:3:1.5:3:39.5: :2. the temperature of the internal mixer is 80 ℃, the rotating speed is 80 revolutions per minute, after mixing for 8 minutes, the upper top bolt is opened, and the rubber is discharged. The rubber compound is vulcanized on a vulcanizing machine at 160 ℃ under 10MPa for 30min, and after the vulcanization reaction is completed, the rubber compound is subjected to sheet forming, and the physical and mechanical properties, ageing resistance and flame retardance of the rubber compound are tested, and are shown in Table 3.
Comparative example 3:
(c) Sequentially adding ethylene propylene rubber, stearic acid, zinc oxide, a vulcanization accelerator TAIC, a vulcanizing agent DCP, high-dispersion white filler powder and an anti-aging agent RD into an internal rubber mixer, wherein the mass ratio of each component is 100:1:3:1.5:3:60:2, other steps are the same as in example 3, and physical and mechanical properties, ageing resistance and flame retardance are tested and shown in Table 3.
Comparative example 4:
(c) Sequentially adding ethylene propylene rubber, silicon rubber, stearic acid, zinc oxide, a vulcanization accelerator TAIC, a vulcanizing agent DCP, high-dispersion white filler powder and an anti-aging agent RD into an internal rubber mixer, wherein the mass ratio of each component is 87.5:12.5:1:3:1.5:3:60:2, other steps are the same as in example 3, and physical and mechanical properties, ageing resistance and flame retardance are tested and shown in Table 3.
Comparative example 5:
(c) Sequentially adding ethylene propylene rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, a vulcanization accelerator TAIC, a vulcanizing agent DCP, high-dispersion white filler powder and an anti-aging agent RD into an internal rubber mixer, wherein the mass ratio of the components is 77.8:22.2:1:3:1.5:3:60:2, other steps are the same as in example 3, and physical and mechanical properties, ageing resistance and flame retardance are tested and shown in Table 3.
TABLE 3 physical and mechanical properties, ageing resistance and flame retardant Properties of Cold-shrinkable ethylene propylene rubber pipe materials
| Performance of | Tensile strength, MPa | Elongation at break% | Ageing resistance,% | Oxygen index |
| Example 1 | 18.7 | 807.7 | 88.1 | 32 |
| Example 2 | 22.3 | 705.7 | 91.0 | 34 |
| Example 3 | 19.3 | 745.5 | 90.4 | 33 |
| Comparative example 1 | 11.3 | 547.6 | 84.0 | 28 |
| Comparative example 2 | 13.2 | 613.3 | 83.2 | 29 |
| Comparative example 3 | 15.4 | 589.4 | 82.7 | 29 |
| Comparative example 4 | 13.1 | 550.1 | 79.8 | 28 |
| Comparative example 5 | 12.2 | 591.1 | 81.2 | 28 |
| Example 4 | 19.1 | 708.8 | 87.9 | 32 |
| Example 5 | 19.7 | 712.0 | 89.4 | 32 |
* Tensile strength and elongation at break were measured according to "measurement of tensile stress strain properties of GB/T528-2009 vulcanized rubber or thermoplastic rubber".
* Ageing resistance: aging conditions (70 ℃ C..times.96 hours) were calculated according to the following formula: aging resistance = tensile strength after aging (MPa) x after aging elongation at break (%) x 100% = tensile strength before aging (MPa) x elongation at break (%) before aging;
* The oxygen index was measured according to the national standard "determination of the burning behaviour of rubber GB T10707-2008".
As can be seen from the data in Table 3, the tensile strength, elongation at break, ageing resistance, flame retardant property and other data indexes of the rubber vulcanized rubber prepared by the method are obviously superior to those of the rubber product without the process. Wherein, the tensile strength is improved by 69.0 to 97.3 percent, the elongation at break is improved by 28.9 to 47.5 percent, the ageing resistance is improved by 4.6 to 14.0 percent, and the flame retardant property is improved by 10.3 to 21.4 percent. According to the technical index of the cold-shrinkable tube, the rubber material can be used as the cold-shrinkable tube rubber material only if the tensile strength exceeds 15MPa and the elongation at break exceeds 700 percent, so that the rubber material can be used as a substitute for the existing special rubber material of the cold-shrinkable tube.
Claims (7)
1. A preparation method of cold-shrinkable ethylene propylene rubber pipe material is characterized in that,
the preparation method comprises the following steps:
(a) In a spray dryer, white carbon black, calcium carbonate, magnesium hydroxide and a coupling agent are mixed according to the mass ratio of 100: 10-50: 10-50: 1-5, adding the white filler particles, wherein the temperature of a spray dryer is 150-250 ℃, and the spraying speed is 20-80 ml/min;
(b) According to white filler particles: the mass ratio of the release agent is 100: 1-5, putting white filler particles and a release agent into a planetary ball mill, mixing at an initial temperature of 25-35 ℃, and after mixing at a temperature of 35-100 ℃, and revolving for 100-200 revolutions per minute, wherein the rotation is that: 200-400 rpm, mixing for 10-30 minutes, and screening by 5-20 layers of screens with the same mesh number of 500-800 meshes to obtain white filler powder with the mesh number of 500-800 meshes;
(c) In an internal mixer, ethylene propylene rubber, silicone rubber, ethylene-acrylic ester copolymer, stearic acid, zinc oxide, a vulcanization accelerator, a vulcanizing agent, white filler powder and an anti-aging agent are added into the internal mixer, wherein the mass ratio of the components is 50-100: 5-50: 10-50: 0.5-5: 0-5: 0.5-2: 0.5-3: 20-80: 1-3, mixing for 5-10 minutes at the temperature of 50-100 ℃ at the rotating speed of 20-120 r/min, and discharging rubber; vulcanizing the mixed rubber on a vulcanizing machine, wherein the temperature of the vulcanizing machine is 150-180 ℃, the pressure is 5-15 MPa, the vulcanizing time is 20-40 min, and discharging sheets after the vulcanizing reaction is completed;
the vulcanization accelerator in the step (c) is one or more of triallyl isocyanurate (accelerator TAIC), N' -m-phenylene bismaleimide (HVA 2) and trimethylolpropane trimethacrylate (TMPTMA);
the vulcanizing agent in the step (c) is one or more of dicumyl peroxide (DCP), 2, 5-dimethyl-2, 5-bis (tertiary butyl peroxy) hexane or di-tertiary butyl peroxide (DTBP).
2. The method according to claim 1, wherein,
the coupling agent in the step (a) is one or more of vinyl tri (beta-methoxyethoxy) silane (A172), vinyl trichlorosilane (A150), gamma-aminopropyl triethoxysilane (A-1100), vinyl triethoxysilane (A151), methyl mercapto propyl dimethoxy silane and bis [ (3-triethoxy silicon) propyl ] tetrasulfide (Si-69).
3. The method according to claim 1, wherein,
the release agent in step (b) comprises one or more of calcium oxide, calcium carbonate, sodium dodecyl benzene sulfonate, polyoxyethylene sorbate and tween-60.
4. The method according to claim 1, wherein,
the coupling agent in the step (a) is one or two of vinyl triethoxysilane (A151) and bis [ (3-triethoxysilyl) propyl ] tetrasulfide (Si-69).
5. The method according to claim 1, wherein,
the isolating agent in the step (b) is one or more of calcium oxide, sodium dodecyl benzene sulfonate and polyoxyethylene sorbate.
6. The method according to claim 1, wherein,
the anti-aging agent in the step (c) comprises one or more of N-phenyl-beta-naphthylamine (anti-aging agent D), 2, 4-trimethyl-1, 2-dihydroquinoline polymer (anti-aging agent RD), 2-mercaptobenzimidazole (anti-aging agent MB), nickel N, N-di-N-butyldithiocarbamate (anti-aging agent NBC) and N-isopropyl-N' -phenyl-p-phenylenediamine (anti-aging agent 4010 NA).
7. A cold shrinkable ethylene propylene rubber tube material prepared by the method of any one of claims 1 to 6.
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| JP2006052281A (en) * | 2004-08-11 | 2006-02-23 | Dow Corning Toray Co Ltd | Rubber composition for vibration-proof or quake-isolation, method for preparing the composition, rubber product for vibration-proof or quake-isolation and method for producing the product |
| CN102746568A (en) * | 2012-07-11 | 2012-10-24 | 江苏德威新材料股份有限公司 | High-temperature-resistance halogen-free flame retardant thermoplastic elastomer and preparation method of elastomer |
| CN105330900A (en) * | 2015-11-19 | 2016-02-17 | 江苏江扬电缆有限公司 | Preparation method of high-performance halogen-free flame retardant and application of flame retardant in cable material |
| CN108586954A (en) * | 2018-05-15 | 2018-09-28 | 山东华凌电缆有限公司 | A kind of halogen-free flame-retardant environment-friendly EP rubbers cold shrink tube and preparation method thereof |
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